goldfish are members of the carp family, they can survive in literally freezing water as long as the water doesnt freeze solid top to bottom...a livestock tank de-icer or pond heater will keep an opening in the pond for O2 exchange, the key would be making sure the pond is deep enough to not turn into a solid icecube, at least 1sqft of the pond should be a minimum of 4ft deep in michigan to prevent complete freezing. (and a mimimum of 10 gals per goldfish and 25 gals per Koi)
i LOVE having some kind of water feature, the sound is incredibly relaxing and watching the fish swim is a serious de-stresor.
im thinking about making a glass front pond when i build mine, about 3 ft deep out of railroad ties and a pond liner and a peice of plexi glass and obviously silacone. i like the idea of being able to watch them from above and while under the water too like a fish tank

hoping to go about 150 gals with 5 ryunkin and 5 shubunkin (my 2 fave types of goldies)
ive found a number of small solar powerd pumps that could easily run a small fountain for watermovment and sound...and i figure if i can do iris and a couple of water lilly and a peat ball it should be enough passive bio filtration to keep that stocking level healthy
i dont think i could be wothout my fish for very long...they are medicinal LOL
WBF...gonna see if i can find their address, would definatly prefer to support a smaller local business with good service than petco or petsmart
